syzbot

INFO: task kworker/u4:4:2548 blocked for more than 143 seconds.
      Not tainted 5.15.161-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:4    state:D stack:24256 pid: 2548 ppid:     2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1f0 kernel/sched/core.c:6459
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518
 __mutex_lock_common+0xe34/0x25a0 kernel/locking/mutex.c:669
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 devlink_nl_port_fill+0x2ab/0x930 net/core/devlink.c:995
 devlink_port_notify+0x4c/0x170 net/core/devlink.c:1052
 devlink_port_register+0x452/0x4c0 net/core/devlink.c:9127
 __nsim_dev_port_add+0x385/0xb90 drivers/net/netdevsim/dev.c:1303
 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:1372 [inline]
 nsim_dev_reload_create drivers/net/netdevsim/dev.c:1421 [inline]
 nsim_dev_reload_up+0x6c9/0x970 drivers/net/netdevsim/dev.c:910
 devlink_reload+0x31a/0x750 net/core/devlink.c:3970
 devlink_pernet_pre_exit+0x1ca/0x350 net/core/devlink.c:11543
 ops_pre_exit_list net/core/net_namespace.c:162 [inline]
 cleanup_net+0x59c/0xb60 net/core/net_namespace.c:587
 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
 worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
 kthread+0x3f6/0x4f0 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:300
 </TASK>
INFO: task dhcpcd:3176 blocked for more than 144 seconds.
      Not tainted 5.15.161-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disable